Classification
000 - Computer science, information & general works
700 - The arts; fine & decorative arts
677
600 - Technology
503
333 - Economics of land & energy
499
620 - Engineering & allied operations
340
363 - Other social problems & services
327
330 - Economics
314
610 - Medicine & health
287
380 - Commerce, communications & transportation
252
900 - History & geography
249
500 - Natural sciences & mathematics
211
140 - Specific philosophical schools
177
576 - Genetics & evolution
165
580 - Plants (Botany)
163
551 - Geology, hydrology & meteorology
156
320 - Political science
124
530 - Physics
124
540 - Chemistry & allied sciences
114
630 - Agriculture & related technologies
98
658 - General management
93
340 - Law
70
720 - Architecture
66
370 - Education
64
414 - Phonology & phonetics
57
400 - Language
54
581 - Specific topics in natural history
52
800 - Literature & rhetoric
46
304 - Factors affecting social behavior
39
612 - Human physiology
32
100 - Philosophy & psychology
26
410 - Linguistics
24
300 - Social sciences
17
331 - Labor economics
14
615 - Pharmacology & therapeutics
13
745 - Decorative arts
11
780 - Music
11
361 - Social problems & social welfare in general
10
170 - Ethics
8
550 - Earth sciences
8
657 - Accounting
8
770 - Photography, photographs & computer art
8
519 - Probabilities & applied mathematics
7
332 - Financial economics
6
200 - Religion
5
297 - Islam, Babism & Bahai Faith
4
650 - Management & auxiliary services
4
001 - Knowledge
3
120 - Epistemology, causation & humankind
3
160 - Logic
3
301 - Sociology & anthropology
3
more ...